Detonator for liquid-oxygen explosives



Nov. 24I 1925.

c. MOTT DETONATOR FOR LIQUID OXYGEN EXPLOSIVES Filed April 29 l924 U ETD S 'r t. T E

l CTIESTER IVIOTT, OF DENVER, COLORADO, ASSTGNOR, BY MESNE ASSIGNMENTS,TO

PUROX COMPANY, OF DENVER, COLORADO, A CORPORATON'OF COLORADO.

DETONATOR non LIQUID-exmen ExPLosIvEs.

Application filed April 29, 1924. Serial No. 709,781.

To-aZZ whom it may concern Be it known that I, CHESTER Mor'r, a citizenof the United States. residing in the city and county of Denver, Stateof Colo?,

rado, have invented a new and useful Detonator for Liquid-Oxygenlixplosives, of which Vthe following is a specification. Myinventionvrelates to the art of blasting and is particularlyapplicableto blast.- ing with the use of liquid oxygen. In this art, a'cartridge is prepared. from absorbent carbonaceous material,r thiscartridge being soaked in4 liquid oxygen and exploded by a .suitabledetonator. I have found that the ordinary detonators are not suitablefor this purpose and it isa particular object of my invent-ion toprovide a detonator that can be depended upon under all conditions ofuse. j The present mercury fulminate'detonator orother vfamiliardetonators or blasting caps are merely cylindrical shells closed at oneend; thev other end being left open to receive the fuse which isJcrimped into the detonator 25 or blasting cap'. -With 'liquid oxygencartridges it,is not practicable to insert the blasting cap and fuseinto the cartridge in such ajway as to .anchor it. With dynamitecartridges the fuse and cap are laced in in i 3" such a way that whenthecartridges are rammed home certain anchorage is secured for the fuse inthe hole. It does not suffice ,to lay a cap and f-use alongside liquidoxygen explosive cartridges for the .explosion of '35 previous shots isalmost certain to pull the fuse and its cap from the hole. u It is,therefore, an object of my invention to provide a certainanchorage ofthe cap and fuse in the hole toinsure` its not being pulled out. Furtherobjects and advantages will be Imade evident hereinafter.

Referring to the drawing which is for illustrative purposes only, Fig. 1is a section through for blasting with my detonator.

' Fig. 2 is an end view.

Flig. 3 is a side view of the detonator .as placed in the hole. n

- Fig. 4 is a section on an enlarged sca-le of the detonator before itis bent into shape.

l' Fig.` 5 is a section von a .more enlarged scale*` on the line 5 5 ofFig. 4. v In blasting wi h liquid`oxygen explosive, a bore hole 11 isprepared in which liquid a hole prepared oxygen cartridges are placed.These carlt5 tridges are exploded by a fuse 13 Aand ai detonatonlli. Theordinary forms of detonatorare not satisfactory when used for thispurpose and the special form illustrated-has been invented by me. Itconsists of a body of absorbent carbonaceous material 20 such charcoal,peat, prepared sawdust, or the 1 te. wire gauze tube 21. lSituated atone end of the absorbent material 20 is a small amount- This material 2Ois carried inside al of acetylide of copper 22. This acetylide manner.

A saturatedsolution of cuprous chloride and water is prepared. Thissolution .is made slightly ammoniacal and a little fer.` rous sulphateis added to keep the solution reduced. Acetylene is then bubbledthroughlof copper may be prepared inthe 'following the solution andI a dark redflocculent prei cipitate is formed. This precipitate lis separated byiltration and partially dried. It is believed thatA the formula for thesubstance produced is Cu2C2:H2O. I have found that this acetylide ofcopper is ay very valuable detonator when used in this connection.Adjacent to the acetylide of copper isV the endo'f an ordinary fuse 23which is secured projecting into the tube 21 by means of a cover 24which isbraided or wrapped. bout the entire detonator. The completeddetonator is then bent into circular form, as shown in Figs. 2 and 3,having;` a diameter slightly less than thebore' hole and is eitherplaced in the bottom of ,this hole or between vtwo cartridges in thehole. The end 30 of the fuse 23 is then ignited. The fuse detonates the'acetylide of copper 22, which in turn detonates the absorbing material21 which has been soaked in liquid oxygen before being placed in thehole.

As already stated, the present blasting cap or detonator is not suitablefor this purpose, but with the detonator of the shape as shown inthe-drawin for the fuse to be withdrawn from the hoe it is necessary topull out the stemming and all of the cartridges Aon topof the detonator,or to bend the detonator tube out straight.

I claim as my invention:

1. A detonator for liquid oxygenexplosive comprising: absorbentmaterial; a body of a detonating acetylide adjacent to said absorbentmaterial; a fuse having one end adjacent to said detonating acetylide;and means for holding said material, said acetylidc and said f use intheir proper relationship.

2. A detonator for liquid oxygen explosive comprising: absorbentcarbonaceous material; a body of copper acetyllde adjacent to saidcarbanaceous material; a fuse having.

one end adjacent to said copper acetylide; a container in which saidcarbonaceous material and said acetylide are placed; and means forsecuring said fuse in said container.

3. A detonator for liquid oxygen explosive comprising: absorbentmaterial; a body of detonating material adjacent to said absorbentmaterial; a fuse having one end adjacent -to said detonating material: acontainer formed of tine mesh screen 1n `which said materials areplaced; and means for securing said fuse in said container.

4. A dctonator for liquid oxygen explosive comprising: absorbentcarbonaceous material; a body o-detonating material adjacent to saidcarbonaceous material: a fuse having one end adjacent to said detonatingmaterial; a container formed of fine mesh metallip Wire screen in whichsaid materials are placed; and means Jfor securing said fuse in saidcontainer.

5. A detonator for liquid oxygen explosive comprising: absorbent 'carbonaceous material; a body of copper acetylide adjacent to saidcarbonaeeous material; a fusehaving one end adjacent to said copperacetylide; a

container having. fineA perforations in the'.

Wall thereof in which said carbonaceous material and said copperacetylide .are placed:

and means for securing said fuse in said container.

6. A detonator comprising: V a tubular member bent into the form of aring.

7. A detonator having a ring-shaped portion; and a second portion at anangle to said ring-shaped portion.

8. A detonator having a ring-shaped portion; and a portion substantiallyatY right,

12. A detonator having a. loop portion; a l

- second portion extending at an angle to'the plane of said loopportion; and a fuse in said second portion.

13. A detonator and a second portion extending substantially at rightangles to the plane of said loop portion.

` 14. A detonator having a loop portion; a

having a`loop portion;

second portion extending substantially at right angles to the plane ofsaid loop portion; and a fuse in said second portion.

15. A detonator as :claimed in claim 1, l

said detonator being formed into a loop.

16. A detonator as claimed in claim 1, said detonator having aloopportion and a second portion extending at an ,angle to the plane of saidloop portion.

17. A detonatorlas claimed in claim 2, said detonator having a loopportion and a second portion extending at an angle to the plane of saidloop portion.

18. A detonator as claimed in claim 2, said detonator being formed intova loop.

19. In a liquid .oxygen detonator, Va qde'- tonating acetylide as adetonating agent.

20. In a liquid oxygen detonator, copper acetylide as a detonatingagent.

In testimony whereoffI have hereunto set my hand at Denver, Colorado,this 19th day V of April, 1924.

' CHESTER MoTT.

